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(No Model.) I 2 Sheets-8heet 1.

' H. M. DARLING.

MORTISING MACHINE. No. 369,924. Patented Sept. 13, 1887.

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7 IN NTOR V x BY ATTOR EYS I (No Model.) 2 Sheet.s--Sheet 2.

H. M. DARLING.

MORTISING MAOHINE.

No. 369,924. I Patented Sept. 13, 1887.,

wikwsae NITED STATES PATENT rrrcn.

HENRY M. DARLING, OF SENECA FALLS, NEW YORK, ASSIGNOR T'O ADEL- BERT S. DAVIS, OF SAME PLACE.

MORTISING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 369,924, dated September 13,, 1887.

Application filed October 4, 1886. Serial No. 215,307.

To aZZ whom it may concern.-

Be itknown that I, HENRY M. DARLING, of Seneca Falls, in the county of Seneca, in the State of New York, have invented new and useful Improvements in Mortising-Machines, of which the following, taken inconnection with the accompanying drawings, is a full, clear, and exact description.

My invention consists, essentially, in an ad- 10 justable bed or work-rest for mortising-machines, combined with a tubular bearing upon which the rest is pivoted, the said rest being secured to the hearing by clamping devices, which construction or arrangement of the parts allows the bed or rest to be readily tilted to a desired angle for cutting. angular mortises, said tubular bearing being elongated to permit the in-and-out adjustment of the rest to adapt and feed the work to the cutter.

It consists, also, in the detail construction and arrangement of the several parts, which will be more particularly described herein, and pointed out in the claims.

In specifying my invention reference is had to the accompanying drawings, in which like letters indicate corresponding parts in all the views;

Figure 1 is a perspective view of my invention, illustrating the general construction of the same as applied to a foot-power mortisingmachine. Fig. 2 is an enlarged detached detail of the adjustable shifting-lever and guide, the lugs on the shifting-lever head be ing detached from the guide. Fig. 3 is a top plan of the shifting-lever and guide, the lugs of the lever-head being engaged with the guide. Fig. 4 is a detached detail, partly in section, of the oval guide-eye in the end of the strokelever. Fig. 5 is a detachedside view of the oval guideeye, and Fig. 6 is a detached top plan of the clamp-gib and section of the supporting-frame, taken on. line a: m, Fig. 1, which permits the vertical adjustment of the bed or rest. Fig. 7 is a front elevation of the supporting-frame of the machine with the rest, bearing, and bearing-support removed; and Fig. 8 is an enlarged detail of the rest, hearing and support, and supporting-frame, the dotted lines showing rest adjusted at an angle.

A is the bed or rest mounted upon a tubu- (No model.)

lar bearing, B, which I preferably cast hollow for economy and convenience of manufacture. The bearing B is attached to asupport, (l, and may be cast integral therewith. The bed A is provided with the curvilinear or circular clamp, to, which fits snugly over the bearing B, and the clamp-screw D, passing through the lugs a of the clamp a, serves to securely clamp the rest to. the bearing. The tubular bearing, forms a pivot, upon which the bed can be tilted to a desired angle for the purpose of cutting angular mortises; and I provide ascale, s, on the curved face of the clamp a and the center mark on the bearing B, which serves to enable the operator to tilt the bed to the desired angle at once, and without experiment find the same. To adjust the cut angularly, it is simply necessary to release the clamp-screw D and tilt the bed until the degree of the desired angle marked on the scale coincides with the center mark on the bearing.

The bearing B is made sufficiently long to permit of the out-and-in adjustment of the rest to adapt and feed the work to the cutter. The rest may be thus adjusted either angularly or out and in on the bearing and firmly secured by the clamp screw D.

The bearing support 0 consists of a plate provided upon its sides with gibs sliding vertically upon ways to w, formed upon the upright supporting-frame U of the machine, such vertical movement of the support allowing the vertical adjustment of the bed or rest.

The support 0 is securely held at the desired adjustment by means of the clampinggib g, operated by the clamp-screw G. The construction of the clamping-gib g is best illus trated at Fig. 6. The gib g is pinned at its upper and lower ends to the support 0 by pins g, and the clamp-screw G clamps the gib g to thesupportG. Thepinsg,beingsecuredfirmly in either the g ib g or the support 0 and loosely in the other part, allow the gib g to separate from the support 0 when the clamp-screw G is released, when, as will be observed], the support 0 and the bed A can be raised or lowered, as desired.

In order to prevent the work from being lifted from the bed when the cutter-tool is withdrawn from the mortise, I provide the holders H H, consisting of rods passing through guide-clamps h h, secured to rods H H, Fig. 1, passing through guide-eyes h h in lugs on the upright frame U.

The holders can be moved up or down in the clamps h h or turned freely on H H, and

thus can be adjusted so as to hold the work when the rest is adjusted for cutting angular mortises.

The supporting-frame U of the machine is IO mounted upon a suitable pedestal, preferably constructed as shown in Fig. 1, where a footpower mortiser is illustrated. At the upper part of the frame I provide guide-sockets u a, through which passes the cutter-holder 5 stem T.

In a slot, Z, Fig. 1, through the frame U is pivoted the strokelever L, said lever being connected to the pedal T by a rod, R. The 1ever L is provided with an oval eye, E, through which the holder-stem F passes. The eye E is circumferentially recessed midway its width on its interior, Figs. 4 and 5, and provided with inclined slots '6 2' through its sides, extending into the recess coincident therewith, and a pin or key is inserted through the slots '6 into the stem T, securing the lever L to the stem, so as to carry down the tool-holder when pressure is applied to the pedal T. In other Words, the cutter-holder spindle is secured to the stroke-lever L by the key or pin insertedthrough the slots i i into the stem, as described.

The object of the recess and of inclining the slots 13 i will be presently explained.

At the upper end of the holder-stem T, I provide a shifting -lever, L, constructed as shown in the detached views, Figs. 2 and 3. The hub 12 is bored to fit onto the stem T,and is made adjustable up or down by the set- 0 screw 19, which secures the shifting-lever to the stem. On the hub 12 of the lever L, I provide forked guide-lugs c c',which serve,in connection with the guide 1" on the frame U, toguide the upper part of the stem T vertically and 4 5 centrally as the cutter is forced into the work by the stroke-lever when power is applied to the pedal.

The guide 1' may be made integral with the frame U, or may consist of a rod inserted into the frame by threading the rod and frame.

The guide-lug c is made shorter than c, to enable the operator to readily disengage the shifting-lever from the guide-rod 1 when it is desired to turn the cutter-tool so as to present the opposite edge thereof to the mortise. To

accomplish this it is simply necessary to adjust the shifting-lever L on the stem or spindle T in position thereon, so that when the stem is turned by the shifting-lever the short lug c clears the guide 7 freely. This is readily accomplished by moving the shifting-lever up or down until cis at the right height, then securing the same by setting up the set-screw b. The lug 0 stops the stem T when the op- 35 posite guide-lugs are in position to engage the guide-rod r.

If the stem T were pivoted rigidly to the stroke-lever L, it would be impossible to turn the stem T and cutter held in the tool-holder; hence, to permit the turning of the cutter, as described, the oval guide-eye E in the end of the stroke-lever is recessed circumferentially on its interior, said recess being inclined and provided with the coincident slots i 13, as previously described. It will be observed that this construction permits the pin or key 19, Fig. 5, which secures the stem T to the strokelever L, to turn in the inclined slots '6 i into the recess in the eye E, and thus reverse the cutter-tool. The opposite end of the strokelever L is provided with a hook, it, to which is secured the spiral S for withdrawing the cutter from the work and returning the stem and tool to its normal position.

On machines of this class it has been customary heretofore to employ a spiral placed on the holder-spindle; but experience clearly demonstrates that such method of construction is liable to work badly, since it is difficult to adjust the tension of the spring properly when tough-grained or very hard timber is mortised, it being necessary to adjust the tension quite frequently for the work operated on. By my invention this desirable result is readily attained, as it is simply necessary to provide a series of teeth, which I preferably form at or near the base of the frame U, as at tt,and hook the spiral S thereon, as shown in Fig. 1. If more tension is required, the fastening is released and shifted a tooth until the desired tension is secured.

It will be observed that considerable advantage in the use of the spiral accrues from I securing it to the stroke-lever, as in my method, over that applied on the stem, owing to the increased leverage due to the point of attachment from the fulcrum of the stroke-lever and from the convenience in adjusting the tension.

The operation of my invention will be readily understood from the foregoing, and it is only necessary to direct attention to the fact that the construction is compact, easy to adjust, and strong and durable.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination of the work-bed having depending clamps or cheeks embracing a tubular bearing projecting from the movable support mounted on the main frame of the machine, the tubular bearing, the movable support provided with means, substantially as described, for holding it in position on the main frame, and the clamp-screw passing through the extremities of the cheeks depending from the work-bed, all constructed and operating substantially as and for the purpose set forth.

2. The combination of a vertically-adjustable support mounted on the frame of a mortising-maclline, and provided with an elongated tubular bearing, with a work bed or rest having cheeks or jaws embracing the tubular bearing and a clamp-screw for securing the jaws to the bearing, substantially as and for the purpose set forth.

3. The combination of the mainupright frame or standard of the machine, provided with ways on the vertical edges thereof, with the movable worlrrest support, clamp-gilos, and hand-screws for securing the gibs and rest to the upright frame, all constructed and operat ing substantially as and for the purpose specified.

4'. The combination of the upright frame or standard U with the pivoted adjustable bed or rest A, the stroke-lever L, spiral spring S, pedal T, and connecting-rod R, substantially as and for the purpose specified.

5. The combination of the upright frame or standard U, having a rack or series of teeth, t, formed thereon, stroke-lever L, carrying the cutter, pedal connected to the stroke-lever for operating the cutter, work bed or rest for supporting the work, and a spiral spring, S, secured at one end to. the stroke-lever and at the other to a tooth, t, of the rack, substan tially as and for the purpose set forth.

6. The stroke-lever L, having the oval guideeye E for the tool-holder stem T, said eye being recessed circumferentially and provided with inclined slots i i, in combination with the pin on the holder-stem T, the holder-stem T, and the cutter, substantially as and for the purpose specified.

7. The combination of the guide 1', holderstem T, adjustable shifting-lever L, guide-lugs c 0, pin 1) in the holder'stem T, and slots z in the guide eye E of the stroke-lever L, the guide E, and stroke lever L, all substantially as specified.

In testimony whereof I have hereunto signed my name, in the presence of two attesting witnesses, this-22d day of September, 1886.

HENRY M. DARLING. [L s.]

Witnesses:

GEORGE W. POUTENS, WM. S. MACDONALD. 

